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我使用 CreateProcess() 运行可执行文件并在最后调用 GetExitCodeProcess() 以获取进程的退出代码。当我使用应用程序验证程序运行它时，我得到了第一次机会异常。我附上了一张日志的图片。在此处输入图像描述

第 1348 行是 GetExitCodeProcess() 调用之后的行。我对日志格式不是很熟悉，所以我问的是 GetExitCodeProcess() 中抛出的异常，在这种情况下我可以忽略它还是我在代码中做错了什么，因为它指向调用 GetExitCodeProcess 之后的行()?

编辑：我的代码：

  if (!CreateProcess(
    NULL,  // it will get the app name from the next argument
    cString, // command line
    NULL,
    NULL,
    TRUE, // don't inherit handles
    CREATE_NO_WINDOW,
    NULL, // use environment of the calling process
    NULL, // use same current drive and directory as the calling process
    &siStartupInfo,
    &processInfo
    ))
  {
    // If process failed return error
    ...
  }

  // Close handles the passed to the child process.
  CloseHandle(hChildStd_ERR_Wr);
  CloseHandle(hChildStd_OUT_Wr);

  // Now read the std::out and std::err from child process and store them in strings to return
  DWORD dwRead;
  CHAR chBuf[4096];
  memset(chBuf, 0, 4096);
  BOOL bSuccess = FALSE;
  UString out = "", err = "";
  for (;;) {
    bSuccess=ReadFile( hChildStd_OUT_Rd, chBuf, 4096, &dwRead, NULL);
    if( ! bSuccess || dwRead == 0 )
      break;

    UString s(chBuf, dwRead);
    out += s;
  }
  dwRead = 0;
  memset(chBuf, 0, 4096);
  for (;;) {
    bSuccess=ReadFile( hChildStd_ERR_Rd, chBuf, 4096, &dwRead, NULL);
    if( ! bSuccess || dwRead == 0 )
      break;

    UString s(chBuf, dwRead);
    err.append(s);
  }

  consoleOutput = out;
  errorOutput = err;

  // Wait for the process to finish. Wait shouldn't happen before reading from pipes because
  // pipe writes happen only when someone is reading from them. For small amounts of data
  // this would not be a problem because the Pipe Manager buffer will consume data so the
  // write will succeed. But for large amounts of data, a reader must be present if not
  // the writer will wait indefinitely.
  WaitForSingleObject(processInfo.hProcess,INFINITE);

  // Close handles returned from Child process
  CloseHandle(processInfo.hProcess);
  CloseHandle(processInfo.hThread);

  // Close read handles of the pipe
  CloseHandle(hChildStd_ERR_Rd);
  CloseHandle(hChildStd_OUT_Rd);

  // Get exit code for the process
  DWORD exitStat = 0;
  GetExitCodeProcess(processInfo.hProcess,&exitStat);
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1 回答 1

4

您在关闭句柄GetExitCodeProcess() 之后调用hProcess，因此您传递给它的句柄无效，这正是验证程序的错误日志告诉您的内容：

当前堆栈跟踪的无效句柄异常

您需要保持hProcess打开状态，直到您完全完成使用它，包括将其传递给GetExitCodeProcess().

于 2016-08-19T22:44:36.580 回答